University of Coimbra, Research Unit for Sport and Physical Activity (CIDAF), Faculty of Sport Sciences and Physical Education, 3040-248 Coimbra, Portugal.
Sensors (Basel). 2023 Jun 22;23(13):5832. doi: 10.3390/s23135832.
In recent years, there has been an exponential increase in the number of devices developed to measure or estimate physical exercise. However, before these devices can be used in a practical and research environment, it is necessary to determine their validity and reliability. The purpose of this study is to test the validity and reliability of a load cell sensor-based device (LC) for measuring the peak force (PFr) and the rate of force development (RFD) during the isometric mid-thigh pull (IMTP) test, using a force plate (FP) as the gold standard. Forty-two undergraduate sport science students (male and female) participated in this study. In a single session, they performed three repetitions of the IMTP test, being tested simultaneously with an LC device and a Kistler force platform (FP). The PFr and RFD data were obtained from the force-time curve of the FP and compared with the LC data, provided automatically by the software of the device (Smart Traction device©). The mean difference between the results obtained by the LC device and the gold-standard equipment (FP) was not significantly different ( > 0.05), for both PFr and RFD, which suggests the validity of the ST results. Bland-Altman analysis showed a small mean difference in PFr = 1.69 N, upper bound = 47.88 N, and lower bound = -51.27 N. RFD showed that the mean difference was -5.27 N/s, upper limit = 44.36 N/s, and lower limit = -54.91 N/s. Our results suggest that the LC device can be used in the assessment of the isometric-mid-thigh-pull test as a valid and reliable tool. It is recommended that this device's users consider these research results before putting the ST into clinical practice.
近年来，开发用于测量或估计身体运动的设备数量呈指数级增长。然而，在这些设备可以在实际和研究环境中使用之前，有必要确定它们的有效性和可靠性。本研究的目的是测试一种基于称重传感器的设备（LC）测量等长大腿中部拉（IMTP）测试中峰值力（PFr）和力发展速率（RFD）的有效性和可靠性，该设备使用力板（FP）作为金标准。42 名本科运动科学学生（男性和女性）参加了这项研究。在一次单一的会议中，他们进行了三次 IMTP 测试的重复，同时使用 LC 设备和 Kistler 力平台（FP）进行测试。从 FP 的力-时间曲线中获取 PFr 和 RFD 数据，并与 LC 数据进行比较，LC 数据由设备的软件（Smart Traction device©）自动提供。LC 设备和金标准设备（FP）获得的结果之间的平均差异没有统计学意义（> 0.05），对于 PFr 和 RFD 都是如此，这表明 ST 结果的有效性。Bland-Altman 分析表明，PFr 的平均差异为 1.69 N，上限为 47.88 N，下限为-51.27 N。RFD 显示平均差异为-5.27 N/s，上限为 44.36 N/s，下限为-54.91 N/s。我们的结果表明，LC 设备可以在等长大腿中部拉测试的评估中作为一种有效和可靠的工具。建议该设备的使用者在将 ST 投入临床实践之前考虑这些研究结果。
